A simplified noise-predictive partial response maximum likelihood detection using M-algorithm for perpendicular magnetic recording channels

Author

Lee, Joohyun ; Lee, Jaejin

Author_Institution

Dept. of Electron. Eng., Dongguk Univ., Seoul, South Korea

Volume

41

Issue

2

fYear

2005

Firstpage

1064

Lastpage

1066

Abstract

We propose a simplified noise-predictive partial response maximum likelihood (NPML) system in conjunction with M-algorithm for dual-layered perpendicular magnetic recording channels. The complexity, which is increased by the construction of noise prediction filter, can be reduced through the M-algorithm. Despite the complexity of the proposed scheme (M=4) is decreased to 1/4 than one of the full NP(12321)ML system, two systems maintain almost the same bit-error rate and the detection performance of the noise-predictive maximum likelihood is better than that of the conventional PRML.

Keywords

computational complexity; filtering theory; maximum likelihood detection; perpendicular magnetic recording; M-algorithm; bit-error rate; detection performance; hard disk drive; noise prediction filter; noise-predictive partial response maximum likelihood detection; perpendicular magnetic recording channels; Additive white noise; Bit error rate; Gaussian noise; Low-frequency noise; Magnetic noise; Maximum likelihood detection; Noise shaping; Perpendicular magnetic recording; Signal to noise ratio; Viterbi algorithm; Hard disk drive; noise-predictive partial response maximum likelihood (NPML) detection; perpendicular magnetic recording;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.842019

Filename

1396301